Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach
Abstract The Antarctic marine environment hosts diversified and highly endemic benthos owing to its unique geologic and climatic history. Current warming trends have increased the urgency of understanding Antarctic species history to predict how environmental changes will impact ecosystem functionin...
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ftdoajarticles:oai:doaj.org/article:f8aa87fafcd04ec6beb2b38ffe1b4937 2023-05-15T13:50:20+02:00 Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach Dominique A. Cowart Stefano Schiaparelli Maria Chiara Alvaro Matteo Cecchetto Anne‐Sophie Le Port Didier Jollivet Stephane Hourdez 2022-07-01T00:00:00Z https://doi.org/10.1002/ece3.9093 https://doaj.org/article/f8aa87fafcd04ec6beb2b38ffe1b4937 EN eng Wiley https://doi.org/10.1002/ece3.9093 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.9093 https://doaj.org/article/f8aa87fafcd04ec6beb2b38ffe1b4937 Ecology and Evolution, Vol 12, Iss 7, Pp n/a-n/a (2022) Antarctic biogeography benthic invertebrate DNA barcoding gene flow polynoid Southern Ocean Ecology QH540-549.5 article 2022 ftdoajarticles https://doi.org/10.1002/ece3.9093 2022-12-31T01:56:29Z Abstract The Antarctic marine environment hosts diversified and highly endemic benthos owing to its unique geologic and climatic history. Current warming trends have increased the urgency of understanding Antarctic species history to predict how environmental changes will impact ecosystem functioning. Antarctic benthic lineages have traditionally been examined under three hypotheses: (1) high endemism and local radiation, (2) emergence of deep‐sea taxa through thermohaline circulation, and (3) species migrations across the Polar Front. In this study, we investigated which hypotheses best describe benthic invertebrate origins by examining Antarctic scale worms (Polynoidae). We amassed 691 polynoid sequences from the Southern Ocean and neighboring areas: the Kerguelen and Tierra del Fuego (South America) archipelagos, the Indian Ocean, and waters around New Zealand. We performed phylogenetic reconstructions to identify lineages across geographic regions, aided by mitochondrial markers cytochrome c oxidase subunit I (Cox1) and 16S ribosomal RNA (16S). Additionally, we produced haplotype networks at the species scale to examine genetic diversity, biogeographic separations, and past demography. The Cox1 dataset provided the most illuminating insights into the evolution of polynoids, with a total of 36 lineages identified. Eunoe sp. was present at Tierra del Fuego and Kerguelen, in favor of the latter acting as a migration crossroads. Harmothoe fuligineum, widespread around the Antarctic continent, was also present but isolated at Kerguelen, possibly resulting from historical freeze–thaw cycles. The genus Polyeunoa appears to have diversified prior to colonizing the continent, leading to the co‐occurrence of at least three cryptic species around the Southern and Indian Oceans. Analyses identified that nearly all populations are presently expanding following a bottleneck event, possibly caused by habitat reduction from the last glacial episodes. Findings support multiple origins for contemporary Antarctic polynoids, ... Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Tierra del Fuego Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Kerguelen Indian New Zealand Ecology and Evolution 12 7 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic biogeography benthic invertebrate DNA barcoding gene flow polynoid Southern Ocean Ecology QH540-549.5 |
spellingShingle |
Antarctic biogeography benthic invertebrate DNA barcoding gene flow polynoid Southern Ocean Ecology QH540-549.5 Dominique A. Cowart Stefano Schiaparelli Maria Chiara Alvaro Matteo Cecchetto Anne‐Sophie Le Port Didier Jollivet Stephane Hourdez Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach |
topic_facet |
Antarctic biogeography benthic invertebrate DNA barcoding gene flow polynoid Southern Ocean Ecology QH540-549.5 |
description |
Abstract The Antarctic marine environment hosts diversified and highly endemic benthos owing to its unique geologic and climatic history. Current warming trends have increased the urgency of understanding Antarctic species history to predict how environmental changes will impact ecosystem functioning. Antarctic benthic lineages have traditionally been examined under three hypotheses: (1) high endemism and local radiation, (2) emergence of deep‐sea taxa through thermohaline circulation, and (3) species migrations across the Polar Front. In this study, we investigated which hypotheses best describe benthic invertebrate origins by examining Antarctic scale worms (Polynoidae). We amassed 691 polynoid sequences from the Southern Ocean and neighboring areas: the Kerguelen and Tierra del Fuego (South America) archipelagos, the Indian Ocean, and waters around New Zealand. We performed phylogenetic reconstructions to identify lineages across geographic regions, aided by mitochondrial markers cytochrome c oxidase subunit I (Cox1) and 16S ribosomal RNA (16S). Additionally, we produced haplotype networks at the species scale to examine genetic diversity, biogeographic separations, and past demography. The Cox1 dataset provided the most illuminating insights into the evolution of polynoids, with a total of 36 lineages identified. Eunoe sp. was present at Tierra del Fuego and Kerguelen, in favor of the latter acting as a migration crossroads. Harmothoe fuligineum, widespread around the Antarctic continent, was also present but isolated at Kerguelen, possibly resulting from historical freeze–thaw cycles. The genus Polyeunoa appears to have diversified prior to colonizing the continent, leading to the co‐occurrence of at least three cryptic species around the Southern and Indian Oceans. Analyses identified that nearly all populations are presently expanding following a bottleneck event, possibly caused by habitat reduction from the last glacial episodes. Findings support multiple origins for contemporary Antarctic polynoids, ... |
format |
Article in Journal/Newspaper |
author |
Dominique A. Cowart Stefano Schiaparelli Maria Chiara Alvaro Matteo Cecchetto Anne‐Sophie Le Port Didier Jollivet Stephane Hourdez |
author_facet |
Dominique A. Cowart Stefano Schiaparelli Maria Chiara Alvaro Matteo Cecchetto Anne‐Sophie Le Port Didier Jollivet Stephane Hourdez |
author_sort |
Dominique A. Cowart |
title |
Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach |
title_short |
Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach |
title_full |
Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach |
title_fullStr |
Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach |
title_full_unstemmed |
Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach |
title_sort |
origin, diversity, and biogeography of antarctic scale worms (polychaeta: polynoidae): a wide‐scale barcoding approach |
publisher |
Wiley |
publishDate |
2022 |
url |
https://doi.org/10.1002/ece3.9093 https://doaj.org/article/f8aa87fafcd04ec6beb2b38ffe1b4937 |
geographic |
Antarctic Southern Ocean The Antarctic Kerguelen Indian New Zealand |
geographic_facet |
Antarctic Southern Ocean The Antarctic Kerguelen Indian New Zealand |
genre |
Antarc* Antarctic Southern Ocean Tierra del Fuego |
genre_facet |
Antarc* Antarctic Southern Ocean Tierra del Fuego |
op_source |
Ecology and Evolution, Vol 12, Iss 7, Pp n/a-n/a (2022) |
op_relation |
https://doi.org/10.1002/ece3.9093 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.9093 https://doaj.org/article/f8aa87fafcd04ec6beb2b38ffe1b4937 |
op_doi |
https://doi.org/10.1002/ece3.9093 |
container_title |
Ecology and Evolution |
container_volume |
12 |
container_issue |
7 |
_version_ |
1766253361456218112 |